US4689507A - Ventilation structure for an electric motor - Google Patents
Ventilation structure for an electric motor Download PDFInfo
- Publication number
- US4689507A US4689507A US06/844,695 US84469586A US4689507A US 4689507 A US4689507 A US 4689507A US 84469586 A US84469586 A US 84469586A US 4689507 A US4689507 A US 4689507A
- Authority
- US
- United States
- Prior art keywords
- rotor shaft
- endshield
- rotor
- fan
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
Definitions
- This invention relates to electric motor structure and more particularly to an improved electric motor ventilation structure wherein a rotor shaft mounted "pull through” fan is associated with a motor endshield defined air circulating chamber adjacent the stator and rotor assembly of an electric motor to cause circulating air to break the "hot" boundary layer of air immediately adjacent the motor windings.
- a novel ventilating structure for electric motors which recognizes the importance of obtaining proper mass heat flow transfer from the stator and rotor assembly by removing or at least breaking the "hot" boundary layer of air which exists in close proximity to the windings, the inventive structure providing a "pull through” ventilating structure which ensures increased air flow and increased air velocity over and proximate the windings. Further, the structure of the present invention provides a negative pressure within a surrounding chamber proximate the stator and rotor assembly to produce effective continuous flow through of the circulating air and mass heat transfer during motor operations.
- the structural arrangement of the present invention utilizes a novel endshield arrangement in accomplishing this desired ventilation and at the same time rotatably journalling the rotor shaft relative the stator.
- the novel, straightforward, and comparatively inexpensive to manufacture and assemble structure of the present invention provides a unique external fan arrangement which can be effectively and efficiently assembled and held in proper operating position on the rotor shaft extending from the stator and rotor assembly of the electric motor.
- the present invention provides an improved electric motor ventilation structure comprising: a stator and rotor assembly, the rotor being rotatably disposed with reference to the stator and having a rotor shaft extending thereform; end-shield means secured to the stator for rotatably journalling the rotor shaft relative the stator, the endshield means including an end wall and a peripheral side wall extending therefrom to surround at least a portion of the stator and rotor assembly, the end and side walls of the endshield means being sized and adapted to define a flow through air circulating chamber adjacent the stator and rotor assembly; and, fan means mounted on the rotor shaft externally of the endshield means, the fan means being in communication with the defined flow through air circulating chamber to provide a negative pressure in the chamber during motor operation for circulation and passage of cooling air over the motor windings of the rotor and stator assembly.
- stator and rotor assembly can be modified without departing from the present invention.
- FIG. 1 is a cross-sectional view of the inventive electric motor ventilation structure (parts of which are not shown to simplify illustration), the flow arrows illustrating the general direction of air flow over the stator and rotor assembly of the motor, a portion of the endshield hold-down arrangement being broken away for this purpose;
- FIG. 2 is a plan view showing a portion of the upper face of the fan member of FIG. 1;
- FIG. 3 is an upper exploded perspective view of the fan member and associated lock washer of FIGS. 1 and 2;
- FIG. 4 is a top plan view of the motor structure of FIG. 1, the fan member and lock washer of FIGS. 1-3 being disclosed in phantom;
- FIG. 5 is an enlarged cross-sectional view of the fan member of FIGS. 1-4;
- FIG. 6 is a bottom plan view or underside of the fan member of FIG. 5.
- motor 2 which can be an induction type of motor, includes a stator 3 and rotor 4 assembly, the stator 3 having a central bore in which rotor 4 is rotatably disposed.
- Rotor 4 includes lower air circulating blades 5 mounted to an end ring on the rotor and a rotor shaft 6 vertically extending from the upper end of rotor 4.
- upper and lower endshields or endcasings, 7 and 8 respectively are provided.
- upper endshield 7 can be of a one-piece diecast construction mold formed from a suitable aluminum alloy, zinc, plastic or other suitable material.
- the endshield 7 includes an horizontally extending end wall 9 and a peripheral side wall 11 extending vertically downward therefrom.
- Lower endshield 8 which can be formed from a suitable metallic material such as steel also includes an end wall 12 and a peripheral side wall 13.
- the upper and lower endshields 7 and 8 are secured to the rotor and stator assembly through suitably spaced screws or bolt and nut assemblies 14, the bolts passing through appropriately sized and configured bolt openings in the endshields and appropriate openings in extending corner sections of stator 3. It is to be noted that each of the endshields are sized and shaped to define an air circulating chamber 16 adjacent and surrounding the stator and rotor assembly.
- each end wall of the endshields is respectively centrally formed to provide cradles to receive and support bearings therein for vertically disposed rotor shaft 6, the cradle of upper end wall 9 receiving ball bearing assembly 17 and the cradle of lower end wall 12 receiving journal bearing 18.
- the upper end wall 9 also is provided with a plurality of circularly spaced arcuate trapezoidal-like outlet apertures 19 through which circulating air from chamber 16 surrounding the rotor and stator assembly can pass.
- Upper endshield or endcasing 7 is further provided with a plurality of apertured bosses 21 (shown in FIG. 4 only). These bosses 21 serve to receive appropriate bolt and nut assemblies to support the motor 2 below an appropriately bottom sealed liquid sump of a dishwasher, or the like, having a part such as an internal pump to which rotor shaft 6 can be connected (not shown).
- the lower free extremity 22 of peripheral side wall 11 extending between securing bolts 14 of upper endshield 7 is spaced from the stator 3 of the rotor and stator assembly, the free extremity 22 of side wall 11 providing an air inlet 23 with stator 3, which inlet 23, except for the bolt securing arrangement, substantially surrounds the rotor and stator assembly of electric motor 2.
- free extremity 22 is so contoured as to provide a venturi-like inlet for air as it is moved into air circulating chamber 16 which surrounds the rotor and stator assembly.
- spacing between endshield 7 and stator 3 and the venturi-like inlet spacing of extremity 22 and stator 3 can be adjusted, depending on the specific stator diameter, to give optimum airflow and wiping action over the motor windings to obtain maximum cooling of the windings. It has been found that spacing at the inlet can range from approximately 3/32nds to approximately 16/32nds of an inch and advantageously from approximately 3/32nds to approximately 8/32nds of an inch for optimum air wiping action so as to break the boundary layer of hot air.
- rotor shaft 6 is provided with a "pull-through" fan member 24 positioned immediately above outlet apertures 19 in spaced relation from end wall 9 of upper endshield 7.
- Fan member 24 which can be formed from any one of a number of suitable materials, such as a sturdy plastic material or an aluminum or zinc alloy, is shown as formed as a flat circular air impervious disc 26 having integrally formed on the lower face (FIGS. 5 and 6) thereof so as to be positioned adjacent the air outlets 19 in the end wall 9 of upper endshield 7 a centrally disposed vertical hub 27.
- hub 27 is vertically splined with the free ends of the splines 28 internally shaped to resiliently engage in shaft fastening relation with the lower of a pair of spaced annular grooves 29 on rotor shaft 6, the lower groove on shaft 6 being the one located most proximate to end wall 9 of upper endshield 7 (FIG. 1).
- the lower face of air impervious disc 26 is formed with a plurality of integral substantially straight air moving blades 31 and 32 extending radially from hub 27.
- Blades 31 and 32 are of differing length for purposes of creating a preselected air circulation pattern.
- certain features of the blade design such as blade shapes, spacings and lengths can be varied by one skilled in the art to create the air circulation patterns desired without departing from the scope or spirit of this invention.
- a U-shaped lock washer 33 is provided to engage the other spaced grooves 29 on rotor shaft 6 to hold fan member 24 on shaft 6.
- the upper face of flat disc 26 of fan member 24 is provided with a protruding annular bevel 34 above and surrounding the aperture of hub 27 and extending from this bevel 24 is a key protrusion 36.
- the base of flat U-shaped lock washer 33 is provided with a recess 37 of greater breadth than key protrusion 36.
- the rotating radial blades on the lower face of fan member 26 create a negative pressure in chamber 16 defined by spaced upper and lower endshields 7 and 8 respectively, drawing circulating air through the venturi-like air inlet passage substantially surrounding the sides of the stator and rotor assembly at comparatively high velocity to break the hot boundary layer of air which exists in close proximity to the windings of the stator and rotor assembly, thus, increasing mass heat flow to the moving air stream, allowing a reduction in motor construction materials and thus lower motor costs without exceeding required temperature limits.
- the air is then further circulated by fan member 24 and lower rotor blades 5 in air circulating chamber 16 and is finally withdrawn or "pulled through” centrally through the arcuate air outlet apertures 19 in end wall 9 of upper endshield 7.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/844,695 US4689507A (en) | 1986-03-27 | 1986-03-27 | Ventilation structure for an electric motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/844,695 US4689507A (en) | 1986-03-27 | 1986-03-27 | Ventilation structure for an electric motor |
Publications (1)
Publication Number | Publication Date |
---|---|
US4689507A true US4689507A (en) | 1987-08-25 |
Family
ID=25293404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/844,695 Expired - Lifetime US4689507A (en) | 1986-03-27 | 1986-03-27 | Ventilation structure for an electric motor |
Country Status (1)
Country | Link |
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US (1) | US4689507A (en) |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4877984A (en) * | 1988-07-19 | 1989-10-31 | Magnetek Universal Electric | Electric motor and pump mounting bracket assembly and method of making |
US4883408A (en) * | 1988-10-07 | 1989-11-28 | Emerson Electric Co. | Motor fan retention on a non-stepped shaft |
EP0354156A2 (en) * | 1988-08-02 | 1990-02-07 | Emerson Electric Co. | Ventilated electric motor assembly |
EP0354158A2 (en) * | 1988-08-02 | 1990-02-07 | Emerson Electric Co. | Minimum height motor assembly using aluminum endshields |
US4900957A (en) * | 1988-07-29 | 1990-02-13 | Emerson Electric Co. | Fan drive with water slinger seal |
US4918343A (en) * | 1988-10-13 | 1990-04-17 | Kohler Co. | Brushless alternator |
EP0410784A1 (en) * | 1989-07-28 | 1991-01-30 | General Electric Company | Drive for laundry machines |
US5031474A (en) * | 1987-03-31 | 1991-07-16 | Siemens Aktiengesellschaft | Industrial robot |
US5375651A (en) * | 1991-04-03 | 1994-12-27 | Magnetek Universal Electric | Draft inducer blower motor mounting and cooling construction |
US5475275A (en) * | 1994-02-10 | 1995-12-12 | Emerson Electric Co. | Motor assemblies with improved endshields |
US5610461A (en) * | 1994-02-14 | 1997-03-11 | Emerson Electric Co. | Motor endshields |
US5675206A (en) * | 1995-12-18 | 1997-10-07 | Siemens Electric Limited | Slim-line brushless motor |
US5883449A (en) * | 1996-08-07 | 1999-03-16 | Hunter Fan Company | Ceiling fan motors |
US6223740B1 (en) | 2000-05-10 | 2001-05-01 | Rheem Manufacturing Company | Fuel-fired furnace with self-cooling draft inducer fan |
US6417595B1 (en) * | 2000-05-24 | 2002-07-09 | Mcmillan Electric Company | Spark suppression dust sealing for a motor apparatus |
US6447272B2 (en) * | 1999-12-24 | 2002-09-10 | Minebea Co., Ltd. | Blower |
US6450874B2 (en) * | 2000-08-07 | 2002-09-17 | Tjernlund Products, Inc. | Thermostatically controlled power draft motor cooling system |
US20020130570A1 (en) * | 2001-03-16 | 2002-09-19 | Howe Steven S. | Alternator and method of manufacture |
US6527516B2 (en) * | 1999-11-30 | 2003-03-04 | Valeo Thermique Moteur | Device for fixing a fan-blade assembly onto a motor shaft |
US20030042806A1 (en) * | 2001-08-29 | 2003-03-06 | Toru Inaba | Alternator for use in a vehicle |
US20060091744A1 (en) * | 2004-10-29 | 2006-05-04 | Hilton Daniel E | Self-cooling electric machine |
USRE39117E1 (en) * | 1999-11-19 | 2006-06-06 | Minebea Co., Ltd. | Blower |
US7066721B2 (en) | 2003-06-11 | 2006-06-27 | Hunter Fan Company | Ceiling fan motors |
US20060175925A1 (en) * | 2005-02-08 | 2006-08-10 | Michael Coles | Motor assembly with a sealed commutator/brush interface |
US20080054746A1 (en) * | 2006-08-29 | 2008-03-06 | Emerson Electric Co. | Motor having thrust system |
US20100277019A1 (en) * | 2009-04-29 | 2010-11-04 | Emerson Electric Co. | Electric Motor Endshield Having Variable Bearing Arrangement |
CN101635482B (en) * | 2008-06-18 | 2011-12-28 | 尼得科电机有限公司 | Electromotor with push system |
US8587165B2 (en) | 2011-03-30 | 2013-11-19 | Dayton-Phoenix Group, Inc. | Cooled fan motor and method of operation |
CN106667406A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and drainage integrated pump for dish washer |
CN106667405A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and draining integrated pump used for dishwasher |
CN106678051A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and draining integrated pump for dishwasher |
US20170214288A1 (en) * | 2016-01-25 | 2017-07-27 | Cummins Generator Technologies Limited | Air flow baffle for rotating electrical machine |
US10291103B2 (en) * | 2016-10-13 | 2019-05-14 | SFEG Corp. | Brushless direct current motor with integrated fan |
US10476332B2 (en) | 2016-12-21 | 2019-11-12 | Siemens Industry, Inc. | Rotor assembly and electrodynamic machine with axial vents for heat transfer |
US11394273B2 (en) * | 2017-09-27 | 2022-07-19 | Ebm-Papst Landshut Gmbh | Electric motor having impellers for cooling |
US20220271621A1 (en) * | 2021-02-25 | 2022-08-25 | Regal Beloit America, Inc. | Electric machine assembly having an internal fan |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US2822485A (en) * | 1954-07-15 | 1958-02-04 | Max Braun | Driving unit for mixing devices |
AT217119B (en) * | 1959-08-20 | 1961-09-11 | Bosch Gmbh Robert | AC machine |
SU474080A1 (en) * | 1969-11-10 | 1975-06-14 | Научно-исследовательский и экспериментальный институт автомобильного электрооборудования и автоприборов | Electric axial venting machine |
DE2844245A1 (en) * | 1978-10-11 | 1980-04-24 | Bosch Gmbh Robert | Motor vehicle generator ventilation fan - has blades pressed from disc and having triangular cross=section |
JPS571966A (en) * | 1980-06-06 | 1982-01-07 | Hitachi Ltd | Indicator for ultrasonic sectional view |
US4488070A (en) * | 1982-11-30 | 1984-12-11 | Mitsubishi Denki Kabushiki Kaisha | Alternating current generator for a car having a multi part partition plate for aiding a cooling fan |
US4492885A (en) * | 1981-03-30 | 1985-01-08 | Mitsubishi Denki Kabushiki Kaisha | Alternating current generator for a car |
-
1986
- 1986-03-27 US US06/844,695 patent/US4689507A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2822485A (en) * | 1954-07-15 | 1958-02-04 | Max Braun | Driving unit for mixing devices |
AT217119B (en) * | 1959-08-20 | 1961-09-11 | Bosch Gmbh Robert | AC machine |
SU474080A1 (en) * | 1969-11-10 | 1975-06-14 | Научно-исследовательский и экспериментальный институт автомобильного электрооборудования и автоприборов | Electric axial venting machine |
DE2844245A1 (en) * | 1978-10-11 | 1980-04-24 | Bosch Gmbh Robert | Motor vehicle generator ventilation fan - has blades pressed from disc and having triangular cross=section |
JPS571966A (en) * | 1980-06-06 | 1982-01-07 | Hitachi Ltd | Indicator for ultrasonic sectional view |
US4492885A (en) * | 1981-03-30 | 1985-01-08 | Mitsubishi Denki Kabushiki Kaisha | Alternating current generator for a car |
US4488070A (en) * | 1982-11-30 | 1984-12-11 | Mitsubishi Denki Kabushiki Kaisha | Alternating current generator for a car having a multi part partition plate for aiding a cooling fan |
Cited By (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5031474A (en) * | 1987-03-31 | 1991-07-16 | Siemens Aktiengesellschaft | Industrial robot |
US4877984A (en) * | 1988-07-19 | 1989-10-31 | Magnetek Universal Electric | Electric motor and pump mounting bracket assembly and method of making |
US4900957A (en) * | 1988-07-29 | 1990-02-13 | Emerson Electric Co. | Fan drive with water slinger seal |
EP0354156A2 (en) * | 1988-08-02 | 1990-02-07 | Emerson Electric Co. | Ventilated electric motor assembly |
EP0354158A2 (en) * | 1988-08-02 | 1990-02-07 | Emerson Electric Co. | Minimum height motor assembly using aluminum endshields |
EP0354158A3 (en) * | 1988-08-02 | 1990-11-14 | Emerson Electric Co. | Minimum height motor assembly using aluminum endshields |
EP0354156A3 (en) * | 1988-08-02 | 1990-11-22 | Emerson Electric Co. | Ventilated electric motor assembly |
US4883408A (en) * | 1988-10-07 | 1989-11-28 | Emerson Electric Co. | Motor fan retention on a non-stepped shaft |
US4918343A (en) * | 1988-10-13 | 1990-04-17 | Kohler Co. | Brushless alternator |
EP0410784A1 (en) * | 1989-07-28 | 1991-01-30 | General Electric Company | Drive for laundry machines |
US5375651A (en) * | 1991-04-03 | 1994-12-27 | Magnetek Universal Electric | Draft inducer blower motor mounting and cooling construction |
US5475275A (en) * | 1994-02-10 | 1995-12-12 | Emerson Electric Co. | Motor assemblies with improved endshields |
US5610461A (en) * | 1994-02-14 | 1997-03-11 | Emerson Electric Co. | Motor endshields |
US5675206A (en) * | 1995-12-18 | 1997-10-07 | Siemens Electric Limited | Slim-line brushless motor |
US5883449A (en) * | 1996-08-07 | 1999-03-16 | Hunter Fan Company | Ceiling fan motors |
USRE39787E1 (en) * | 1999-11-19 | 2007-08-21 | Minebea Co., Ltd. | Blower |
USRE39117E1 (en) * | 1999-11-19 | 2006-06-06 | Minebea Co., Ltd. | Blower |
US6527516B2 (en) * | 1999-11-30 | 2003-03-04 | Valeo Thermique Moteur | Device for fixing a fan-blade assembly onto a motor shaft |
US6447272B2 (en) * | 1999-12-24 | 2002-09-10 | Minebea Co., Ltd. | Blower |
US6223740B1 (en) | 2000-05-10 | 2001-05-01 | Rheem Manufacturing Company | Fuel-fired furnace with self-cooling draft inducer fan |
US6417595B1 (en) * | 2000-05-24 | 2002-07-09 | Mcmillan Electric Company | Spark suppression dust sealing for a motor apparatus |
US6450874B2 (en) * | 2000-08-07 | 2002-09-17 | Tjernlund Products, Inc. | Thermostatically controlled power draft motor cooling system |
US20040169429A1 (en) * | 2001-03-16 | 2004-09-02 | Howe Steven E. | Alternator and method of manufacture |
US6774518B2 (en) | 2001-03-16 | 2004-08-10 | Altech Generating Systems Llc | Alternator and method of manufacture |
US6849974B2 (en) | 2001-03-16 | 2005-02-01 | Altech Generating Systems, Llc | Alternator and method of manufacture |
US20050121988A1 (en) * | 2001-03-16 | 2005-06-09 | Altech Generating Systems Llc | Alternator and method of manufacture |
US20020130570A1 (en) * | 2001-03-16 | 2002-09-19 | Howe Steven S. | Alternator and method of manufacture |
US6633098B2 (en) * | 2001-08-29 | 2003-10-14 | Hitachi, Ltd. | Alternator for use in a vehicle |
US20030042806A1 (en) * | 2001-08-29 | 2003-03-06 | Toru Inaba | Alternator for use in a vehicle |
US7066721B2 (en) | 2003-06-11 | 2006-06-27 | Hunter Fan Company | Ceiling fan motors |
US20060091744A1 (en) * | 2004-10-29 | 2006-05-04 | Hilton Daniel E | Self-cooling electric machine |
US7282823B2 (en) | 2004-10-29 | 2007-10-16 | Emerson Electric Co. | Self-cooling electric machine |
US20060175925A1 (en) * | 2005-02-08 | 2006-08-10 | Michael Coles | Motor assembly with a sealed commutator/brush interface |
US7102266B2 (en) | 2005-02-08 | 2006-09-05 | Ametek, Inc. | Motor assembly with a sealed commutator/brush interface |
US7732960B2 (en) * | 2006-08-29 | 2010-06-08 | Emerson Electric Co. | Motor having thrust system |
US20080054746A1 (en) * | 2006-08-29 | 2008-03-06 | Emerson Electric Co. | Motor having thrust system |
CN101635482B (en) * | 2008-06-18 | 2011-12-28 | 尼得科电机有限公司 | Electromotor with push system |
US20100277019A1 (en) * | 2009-04-29 | 2010-11-04 | Emerson Electric Co. | Electric Motor Endshield Having Variable Bearing Arrangement |
US7932653B2 (en) * | 2009-04-29 | 2011-04-26 | Nidec Motor Corporation | Electric motor endshield having variable bearing arrangement |
US8587165B2 (en) | 2011-03-30 | 2013-11-19 | Dayton-Phoenix Group, Inc. | Cooled fan motor and method of operation |
US20170214288A1 (en) * | 2016-01-25 | 2017-07-27 | Cummins Generator Technologies Limited | Air flow baffle for rotating electrical machine |
US11228224B2 (en) * | 2016-01-25 | 2022-01-18 | Cummins Generator Technologies Limited | Air flow baffle for rotating electrical machine |
US10291103B2 (en) * | 2016-10-13 | 2019-05-14 | SFEG Corp. | Brushless direct current motor with integrated fan |
US10476332B2 (en) | 2016-12-21 | 2019-11-12 | Siemens Industry, Inc. | Rotor assembly and electrodynamic machine with axial vents for heat transfer |
CN106678051A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and draining integrated pump for dishwasher |
CN106667405A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and draining integrated pump used for dishwasher |
CN106667406A (en) * | 2016-12-30 | 2017-05-17 | 芜湖广盈实业有限公司 | Washing and drainage integrated pump for dish washer |
US11394273B2 (en) * | 2017-09-27 | 2022-07-19 | Ebm-Papst Landshut Gmbh | Electric motor having impellers for cooling |
US20220271621A1 (en) * | 2021-02-25 | 2022-08-25 | Regal Beloit America, Inc. | Electric machine assembly having an internal fan |
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Owner name: EMERSON ELECTRIC CO., 8000 WEST FLORISSANT AVENUE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:BAKER, GERALD N.;FISCHER, CARL R.;REEL/FRAME:004586/0863 Effective date: 19860717 Owner name: EMERSON ELECTRIC CO., A CORP. OF MISSOURI,MISSOURI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAKER, GERALD N.;FISCHER, CARL R.;REEL/FRAME:004586/0863 Effective date: 19860717 |
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